FR2800746A1 - CLEANING COMPOSITION - Google Patents

Abstract

The invention concerns a cleaning composition for eliminating at room temperature polysulphide sealant, tars, fuel oils and other fatty grime and/or grime adhering to hard surfaces made of metal, glass or to textiles. Said composition comprises at least a mixture of polyarylalkanes, at least an oxygenated organic solvent selected among alkylene glycol ethers, dialkylene glycol monoethers, trialkylene glycol monoethers, alkylene glycol diethers, dialkylene glycol diethers, diacetone alcohol, 2-methyl-2,4-pentanediol and an aliphatic hydrocarbon or a mixture of aliphatic hydrocarbons.

Description

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CLEANING COMPOSITION
The present invention relates to a cleaning composition that can be used especially for removing at ambient temperature polysulfide mastics, tars, fuels and other greasy or adherent soils from hard metal surfaces, ceramics, glass, plastics, printed circuits or of textiles.

 Traditionally, these surfaces have been cleaned with chlorinated solvents such as methylene chloride, 1,1,1-trichloroethane or 1,1,2-trichloro-1,2,2-trifluoroethane but these solvents have been condemned by the Montreal Protocol because of their impact on the ozone layer or because of their toxicity.

 To replace these chlorinated solvents, esters such as alkyl lactates have been used. These products have the disadvantage of being smelly and corrode the surfaces to be cleaned. To remove polysulfide mastics (Thiokol) from glass or metal surfaces, US Pat. No. 5,561,215 proposes a composition comprising at least 50% by weight of pyrrolidones and very particularly of N-methyl-2-pyrrolidone.

 These pyrrolidone solvents have the disadvantage of being hygroscopic, which is unacceptable when cleaning times are high, because the presence of water causes a decrease in efficiency of said solvents. They are also smelly.

 In addition, these pyrrolidone solvents would be suspected of being carcinogenic.

 Also, the pyrrolidone solvent-based compositions have a stripping effect and, therefore, their use is unacceptable in certain types of applications of the present invention because they attack the coating in paint.

 The Applicant has now found a multi-purpose cleaning composition consisting of solvents that do not have the drawbacks described above and which can be used to effectively remove polysulfide mastics, tars, fuels and other greasy or adherent soils from hard metal surfaces at room temperature. ceramics, glass, plastics, printed circuits or textiles.

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The present invention therefore relates to a cleaning composition characterized in that it comprises:
20% to 50% by weight and preferably 30% to 50% by weight of at least one polyarylalkane mixture;
B 20% to 40% by weight and, preferably, 25% to 35% by weight of at least one oxygenated organic solvent selected from monoethers alkylene glycols, monoethers dialkylene glycols, monoethers trialkylene glycols, diethers alkylene glycols, diethers of dialkylene glycols, diacetone alcohol, 2-methyl-
2,4-pentanediol; and
C 20% to 40% by weight and preferably 25% to 35% by weight of at least one aliphatic hydrocarbon or a mixture of aliphatic hydrocarbons; A + B + C representing 100% by weight.

dans laquelle n1 et n2 = 0 ou 1 et qui contient des produits (A) tels que n1 + n2 = 0 et des produits (A) tels que n1 + n2 = 1. According to the present invention, the polyarylalkane mixture is a mixture which comprises products of formula (A)

wherein n1 and n2 = 0 or 1 and which contains products (A) such that n1 + n2 = 0 and products (A) such that n1 + n2 = 1.

 The polyarylalkane mixture may contain 2-ring product (A), (methylbenzyl) xylene, and 3-ring product (A) which is bis (methylbenzyl) xylene. This product (A) with 3 rings can be product such that n1 = 1 and n2 = 0, the product such that n1 = 0 and n2 = 1 or a mixture of these two last. The polyarylalkane mixture may also contain products such that n1 = 1 and n2 = 1.

 By way of illustration of such a mixture that can be used according to the present invention, mention may be made of the mixture of polyarylalkanes sold by the company ELF ATOCHEM S A. under the name JARISOL XX having a weight content of mono and bis (methylbenzyl) xylenes greater than 99%.

 The mixture of polyarylalkanes comprising products of formula (A) can be obtained by condensation of (methyl benzyl) chloride with

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 with xylene in the presence of a Friedel and Crafts catalyst according to a process described in EP 0299867 B1.

 According to the present invention, the monoethers of the alkylene glycols are in particular: C 4 -C 25 propylene glycol monoethers, such as propylene glycol (PM) monomethyl ether, propylene glycol (PE) monoethyl ether, propylene glycol mono-n-propyl ether (PNP), propylene glycol mono-tert-butyl ether (PTB), propylene glycol mono-n-butyl ether (PNB) and mono-hexyl ether propylene glycol; monoethers of ethylene glycol at C3-C25, such as hexyl ether of ethylene glycol, octyl ether of ethylene glycol and phenyl ether of ethylene glycol.

 The monoethers of the dialkylene glycols are, for example, the dipropylene glycol monomethyl ether (DPM), the dipropylene glycol mono-n-propyl ether (DPNP), the dipropylene glycol mono-tert-butyl ether (DPTB). ), dipropylene glycol mono-n-butyl ether (DPNB), and dipropylene glycol monohexyl ether, diethylene glycol (Butyl Diglycol Ether - BDG) n-butyl ether, diethylene glycol hexyl ether, and the octyl ether of diethylene glycol.

 The monoethers of the trialkylene glycols are, for example, the monomethyl ether of tripropylene glycol (TPM) and the mono-n-butyl ether of tripropylene glycol (TPNB).

 The diethers of the alkylenes glycols are especially: C5-C25 propylene glycol diethers, such as propylene glycol dimethyl ether; benzyl methyl ether propylene glycol; the propylene glycol buyl methyl ether and the propylene glycol dibutyl ether; diethyl ethers of C 4 -C 25 ethylene glycol, such as diethyl ether of ethylene glycol and dibutyl ether of ethylene glycol.

 The diethers of the dialkylenes glycols are, for example, dimethyl ether of dipropylene glycol, butyl methyl ether of dipropylene glycol and dibutyl ether of dipropylene glycol.

 Among these compounds, use will preferably be made of propylene glycol monoethers such as in particular propylene glycol mono-n-butyl ether (PNB), propylene glycol mono-tert-butyl ether (PTB) and monoethers of propylene glycol. diakylene glycols such as dipropylene glycol mono-n-butyl ether (DPNB).

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According to the present invention, the aliphatic hydrocarbons or the aliphatic hydrocarbon mixtures may be branched, cyclic linear hydrocarbons or combinations thereof containing from 6 to 24 carbon atoms, preferably 8 to 24 carbon atoms. Examples of these aliphatic hydrocarbons include alkanes, such as hexane, octane, decane, dodecane, hexadecane, mineral oils, paraffinic oils, decahydronaphthalene, bicyclohexane, cyclohexane, and olefins such as 1-decene, 1dodecene, octadecene and hexadecene. Examples of a mixture of commercially available aliphatic hydrocarbons are: NORPARTM 12,13 and 15 (normal paraffinic solvents available from the company "EXXON CORPORATION"); - ISOPARTM G, H, K, L, M, V (isoparaffinic solvents available after the Company "EXXON CORPORATION"); - SHELLSOLTM solvents (available from the company "SHELL
CHEMICAL COMPANY ") - PETROSOLVTM from CEPSA D-15/20, D-19/22, D-20/26, D-24/27,
D-28/31 (sections of n-paraffins deflavored available from the company "CEPSA"); the hydrocarbon solvents EXXSOLTM marketed by the
Company "EXXON CORPORATION" - Hydrocarbon solvents ISANETM marketed by the Company
TOTAL.

 According to the present invention, it is preferred to use petroleum fractions or de-aromatised n-paraffin sections having a distillation range of from 150 ° C. to 310 ° C. and preferably from 185 ° C. to 275 ° C.

 De-aromatized cuts are currently those which do not contain single-ring aromatics such as toluene and benzene.

 PETROSOLV ™ from "CEPSA" and in particular the D-24/27 cut having a distillation range ranging from 240 ° C. to 270 ° C. and the D-20/26 cut having a distillation range of 185 ° C. to 265 ° C. will be used in particular. C.

 The composition according to the invention may further contain at least one perfume.

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 The composition of the present invention can be applied to the surfaces to be cleaned using a brush, a cloth, spraying, dipping. Optionally, ultrasonic equipment can be used.

 The composition according to the invention has the advantage of being polyvalent. It makes it possible to quickly remove, at ambient temperature, various types of soiling such as mastics, fuels, tars and, in general, any fatty soils adhering to very diverse substrates (glass, metal surfaces ...) .

 The following examples illustrate the invention.

EXAMPLES
CLEANING OF POLYSULFIDE MASTICS
Products used:
Sealants: - PR 1776; - PR 1436 G (NA), hereinafter PR 1436; - PR 1422 Class B (NA), hereinafter PR 1422.

 These mastics, marketed by the company "The French Joint" are in the form of two components, one of the components is based polysulfide liquid resin, the other component is constituted by a hardener.

 By mixing at room temperature of the 2 components, the polysulfide liquid resin polymerizes more or less slowly to give a mastic.

Solvents: - Mixture of mono- and bis (methylbenzyl) xylenes marketed by the
ELF ATOCHEM SA under the designation JARYSOL XX, hereinafter XX. This mixture comprises about 85% by weight of (methylbenzyl) xylenes and about 15% by weight of bis (methylbenzyl) xylenes.

 - The mono-n-butyl ether of propylene glycol, (hereinafter PNB), - 2-methyl-2,4-pentanediol, hereinafter HG, - Petroleum fraction CEPSA D24 / 27, hereinafter 24 / 27 which is a mixture of de-aromatized n-paraffins having a distillation range of 240 C to 270 C.

Cleaning protocol - Rag test:
The mastics are applied to 40 mm x 20 mm aluminum plates previously cleaned and degreased with ethanol to boiling. The cleaning compositions according to the present

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 The invention obtained by simply cold mixing the constituents is tested at room temperature with a cloth on the mastics after polymerization times indicated in Table 1 by 1 hour, 2 hours and 20 hours.

 All putties used are fully cured (cured) after 20 hours and not completely cured after 1 and 2 hours.

 The results are shown in Table 1.

The evaluation is only visual and a score is given between 1, 2 or 3:
1: means: no action of the cleaning composition,
2: means: partial cleaning,
3: means: the surface is totally cleaned.

 In Table 1, we have also reported the cleaning results obtained with butyl lactate (LB), a solvent used in the prior art, the solvents taken separately, used in the cleaning compositions according to the invention and a binary mixture. XX / HG.

 In this Table 1, the percentage of constituents in the compositions is a weight percentage. NC means not in accordance with the invention.

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<Tb>

SOLVENTS <SEP> OR <SEP> HG <SEP>: <SEP> 50 <SEP>% <SEP> XX: <SEP> 35 <SEP>% <SEP> XX: <SEP> 35 <SEP>% <SEP>
<tb> COMPOSITIONS <SEP> LB <SEP> XX <SEP> HG <SEP> PNB <SEP> 24/27 <SEP> XX <SEP>: <SEP>% <SEP> PNB <SEP>: <SEP> 35 <SEP>% <SEP> HG <SEP>: <SEP>%
<tb> DE <SEP> CLEANING <SEP> NC <SEP> NC <SEP> NC <SEP> NC <SEP> (NC) <SEP> (NC) <SEP> 24/27: 30% <SEP> 24 / 27 <SEP>: <SEP> 30 <SEP>% <SEP>
<tb> TP <SEP> (hour)
<tb> @ <SEP> 1 <SEP> 2 <SEP> 20 <SEP> 1 <SEP> 2 <SEP> 20 <SEP> 1 <SEP> 2 <SEP> 20 <SEP> 1 <SEP> 2 <SEP > 20 <SEP> 1 <SEP> 2 <SEP> 20 <SEP> 1 <SEP> 2 <SEP> 20 <SEP> 1 <SEP> 2 <SEP> 20 <SEP> 1 <SEP> 2 <SEP> 20
<tb> MASTICS
<tb> PR1776 <SEP> 3 <SEP> 2 <SEP> 1 <SEP> 3 <SEP> 2 <SEP> 2 <SEP> - <SEP> - <SEP> - <SEP> - <SEP> - <SEP > - <SEP> - <SEP> - <SEP> - <SEP> - <SEP> - <SEP> - <SEP> 3 <SEP> 3 <SEP> 1 <SEP> 3 <SEP> 3 <SEP> 1
<tb> PR <SEP> 1436 <SEP> 2 <SEP> 2 <SEP> 2 <SEP> 3 <SEP> 2 <SEP> 1 <SEP> 3 <SEP> 2 <SEP> 1 <SEP> 3 <SEP > 2 <SEP> 1 <SEP> 3 <SEP> 2 <SEP> 1 <SEP> 2 <SEP> 2 <SEP> 1 <SEP> 3 <SEP> 3 <SEP> 1 <SEP> 3 <SEP> 3 <SEP> 1
<tb> PR <SEP> 1422 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 2 <SEP> 1 <SEP> 1 <SEP> 3 <SEP> 2 <SEP> 1 <SEP> 3 <SEP > 2 <SEP> 1 <SEP> 3 <SEP> 2 <SEP> 1 <SEP> 2 <SEP> 2 <SEP> 1 <SEP> 3 <SEP> 3 <SEP> 1 <SEP> 3 <SEP> 3 <SEP> 1
<Tb>
TABLE 1

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Cleaning a stain based on enriched crude fuel:
The enriched crude fuel is a mixture of heavy fuel enriched with 20% by weight of Fontainebleau sand and 20% by weight of carbon black.

 Solvents used: - XX - PNB - HG - 24/27 - Petroleum fraction CEPSA D20 / 26, hereinafter 20/26, which is a mixture of defavored n-paraffins having a distillation range of 185 ° C to 265 ° C.

Cleaning protocol:
A 40 mm x 20 mm stainless steel plate is degreased with methylene chloride or 1,1-dichloro-1-fluoroethane (141b) and weighed.

 The coating is then carried out by coating it with a flexible plastic spatula of about 1 g accurately weighed with enriched fuel oil.

 In a beaker high form of useful volume equal to 50 ml, provided with a magnetic bar, is introduced 50 g of the cleaning composition to be tested, then the stainless steel plate coated with enriched fuel is introduced, stirred at 400 rpm. / min, then the weight loss of the drained plate is recorded at 1.5, 10.15, 20 and 25 minutes.

 The weighing operation lasts 20 seconds.

dans laquelle : mO est le poids en grammes de la plaque propre (fraîchement nettoyée), m1 est le poids en grammes de la plaque enrobée par le fuel enrichi, m2 est le poids en grammes de la plaque au temps t. The results are reported in Table 2. In Table 2, the efficiency E expressed in% is calculated after each reading (weighing) according to formula (I):

in which: mO is the weight in grams of the clean plate (freshly cleaned), m1 is the weight in grams of the coated plate by the enriched fuel, m2 is the weight in grams of the plate at time t.

 Efficiency is the amount of dirt removed.

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 Negative numbers mean that the soil retains solvent (solvent retention), which results in m2> m1.

 In Table 2, we have also reported the cleaning results obtained with the solvents used separately used in the composition according to the invention and with binary compositions not in accordance with the invention.

In Table 2, the percentage of constituents in the compositions is a weight percent. NC means not in accordance with the invention.

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<Tb>

EFFECTIVENESS <SEP> E <SEP> (EN <SEP>%) <SEP> AU <SEP> TIME <SEP> t <SEP> (EN <SEP> MINUTES)
<tb> TIME <SEP> t <SEP> EN <SEP> MINUTE
<tb> SOLVENTS <SEP> 1 <SEP> 5 <SEP> 10 <SEP> 15 <SEP> 20 <SEP> 25
<tb> OR <SEP> COMPOSITION
<tb> XX <SEP> (NC) <SEP> -9.18 <SEP> 1.67 <SEP> 12.40 <SEP> 25.65 <SEP> 35.60 <SEP> 50.28
<tb> PNB (NC) <SEP> -11-13 <SEP> -14.6 <SEP> -14.3 <SEP> -10 <SEP> -4.9 <SEP>
<tb> 24/27 <SEP> (NC) <SEP> -18-19 <SEP> -17.8 <SEP> -17.3 <SEP> -15.5 <SEP> -12.3
<tb> XX <SEP>: <SEP> 50 <SEP>% <SEP>
<tb> 24/27 <SEP>: <SEP> 50 <SEP>% <SEP> 6 <SEP> 12 <SEP> 32 <SEP> 50 <SEP> 61 <SEP> 69
<tb> XX: <SEP> 50% <SEP>
<tb> PNB: <SEP> 50 <SEP>% <SEP> -4.56 <SEP> 25.15 <SEP> 48.64 <SEP> 71.23 <SEP> 83 <SEP> 89
<tb> (NC)
<tb> XX <SEP>: <SEP> 40 <SEP>% <SEP>
<tb> PNB: <SEP> 40 <SEP>% <SEP> -5.65 <SEP> 27.17 <SEP> 58.14 <SEP> 82.66 <SE> 92.43 <SEP> 94.16
<tb> 24/27 <SEP>: <SEP> 20 <SEP>%
<tb> XX <SEP>: <SEP> 40 <SEP>%
<tb> PNB: <SEP> 40 <SEP>% <SEP> 0.26 <SEP> 25.88 <SE> 57.56 <SE> 82.60 <SE> 91.37 <SEP> 94
<tb> 20/26 <SEP>: <SEP> 20 <SEP>%
<tb> XX <SEP>: <SEP> 35 <SEP>% <SEP>
<tb> PNB <SEP>: <SEP> 35 <SEP>% -3.41 <SEP> 25.54 <SEP> 54.90 <SE> 79.63 <SE> 87.83 <SEP> 93
<tb> 24/27 <SEP>: <SEP> 30 <SEP>%
<Tb>

TABLE 2
CLEANING BITUMES:
The bitumen used is a bitumen 300 which is the end of the distillation of crude oil and corresponds to mixtures of saturated and saturated hydrocarbons of high molecular weight.

 Products used: - XX - GNP - 24/27

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Cleaning protocol:
A 40 mm x 20 mm stainless steel plate is degreased with CH2Cl2 or 141b and then weighed.

 The bitumen 300 and the plate are placed in an oven at 110 C for 30 minutes before coating the plate.

 The bitumen plate 300 is coated by dipping and is allowed to drain for 48 hours in the open air under fume cupboard.

 In a beaker high form of useful volume equal to 50 ml provided with a magnetic bar, 50 g of the cleaning composition to be tested are introduced, then the stainless steel plate coated with bitumen 300 is introduced, agitated at 400 rpm. min then the weight loss of the plate is recorded at 1.5, 10.15, 20.25 and 30 min.

 The results are reported in Table 3.

 In Table 3, the efficiency E, expressed in%, is determined after each weighing according to formula (I) given previously.

The percentage of the constituents in the composition is a weight percentage. NC means not in accordance with the invention.

<Tb>
<Tb>

EFFECTIVENESS <SEP> E <SEP> (EN <SEP>%) <SEP> AU <SEP> TIME <SEP> t <SEP> (EN <SEP> MINUTES)
<tb> TIME <SEP> t <SEP> EN <SEP> MINUTE
<tb> SOLVENTS <SEP> 1 <SEP> 5 <SEP> 10 <SEP> 15 <SEP> 20 <SEP> 25 <SEP> 30
<tb> OR <SEP> COMPOSITION
<tb> XX <SEP> (NC) <SEP> -45-58.5 <SEP> -15-13.7 <SEP> 9.6 <SEP> 12.9 <SEP> 22.4
<tb> PNB (NC) <SEP> -19.85-11.2 <SEP> 8 <SEP> 44.5 <SEP> 54.8 <SEP> 64 <SEP> 66.5
<tb> 24127 <SEP> (NC) <SEP> -8.7 <SEP> 13 <SEP> 43.6 <SEP> 69.8 <SE> 78 <SEP> 80 <SEP> 89
<tb> XX <SEP>: <SEP> 35 <SEP>%
<tb> PNB <SEP>: <SEP> 35 <SEP>% <SEP> -7.6 <SEP> 17.5 <SEP> 38.5 <SEP> 61.2 <SEP> 76.25 <SEP> 82 <SEP> 92.2
<tb> 24/27 <SEP>: <SEP> 30 <SEP>%
<Tb>
TABLE 2

Claims (14)

A + B + C representing 100% by weight. C 20% to 40% by weight of at least one aliphatic hydrocarbon or a mixture of aliphatic hydrocarbons; B 20% to 40% by weight of at least one oxygenated organic organic solvent selected from the monoethers of the alkylene glycols, the monoethers of the dialkylene glycols, the monoethers of the trialkylene glycols, the diethers of the alkylene glycols, the diethers of the dialkylene glycols, the diacetone alcohol, 2-methyl-2,4-pentanediol; and 20% to 50% by weight of at least one polyarylalkane mixture;  1. Cleaning composition characterized in that it comprises: 2. Composition according to Claim 1, characterized in that: A represents 30% to 50% by weight, B represents 25% to 35% by weight, C represents 25% to 35% by weight, A + B + C representing 100% by weight. 3. Composition according to one of claims 1 and 2, characterized in that the mixture of polyarylalkanes is a mixture which comprises products of formula (A):

 wherein n1 and n2 = 0 or 1 and which contains products A such that n1 + n2 = 0 and products A such that n1 + n2 = 1. 4. Composition according to claim 3, characterized in that the mixture of polyarylalkanes is a mixture having a weight content of mono- and bis (methylbenzyl) xylenes greater than 99%. 5. Composition according to one of claims 1 and 2, characterized in that the component B is a monoether of an alkylene glycol. <Desc / Clms Page number 12> 6. Composition according to Claim 5, characterized in that the monoether of an alkylene glycol is propylene glycol mono-n-butyl ether (PNB) or propylene glycol mono-tert-butyl ether (PTB). 7. Composition according to one of claims 1 and 2, characterized in that the compound B is a monoether of a dialkylene glycol. 8. Composition according to Claim 7, characterized in that the monoether of a dialkylene glycol is the mono-n-butyl ether of dipopylene glycol (DPNB). 9. Composition according to one of claims 1 and 2, characterized in that component B is 2-methyl-2,4-pentanediol. 10. Composition according to one of claims 1 and 2, characterized in that the component C is a mixture of aliphatic hydrocarbons. 11. Composition according to claim 10, characterized in that the mixture of aliphatic hydrocarbons is a cut of de-aromatized n-paraffins having a distillation range of 150 C to 310 C. 12. A composition according to claim 11, characterized in that the cut of de-aromatized n-paraffins has a distillation interval ranging from 240 C to 270 C. 13. Composition according to claim 11, characterized in that the cut of deflavored n-paraffins has a distillation interval ranging from 185 C to 265 C. 14. Application of a composition according to one of claims 1 to 13 for removing polysulfide mastics, tars or fuels hard metal surfaces, ceramics, glass, plastics printed circuit boards, textiles.